FOTW describes white-red-white horizontal bands, with white Wm. H M & Co lettering and two narrow white bands on the red. The sources variously name Algemeene Scheepvaart Maatschappij, Batavier Line and the principal or Transport company. Reed makes the bands equal; Batavier III and Batavier V photographs confirm the funnel forms.
The alternative FOTW description is white with a broad red horizontal stripe bearing white WMHM&Co lettering, with the o small. Rosanoski notes that the sources present differing versions without explaining a sequence or showing both, and suggests that separate services might account for them.
Keep the explicit scope label independent; no alias or company identity is inferred.